Behind the wall: Save them without replacing them
If your seawall is cracking, leaning, or failing, it’s tempting to blame the water in front of it. But in most cases, the real culprit is what’s happening behind the wall.
Erosion and Voids
When water makes its way behind a seawall—through cracks, drainage pathways, or groundwater movement—it doesn’t just sit there. It moves. And as it moves, it carries fine soil particles with it, gradually creating hidden voids and channels. Over time, this erosion weakens the ground behind the wall, reducing its ability to support the structure and increasing the risk of collapse.
The signs are familiar: soil loss, leaning walls, sinkholes behind the structure, standing water, and visible cracking. But the true problem lies in the unseen—and that’s exactly where HMI gets to work.
Replacement Isn’t Always the Answer
Tearing out and replacing a seawall is expensive, time-consuming, and often unnecessary. In many cases, the wall itself is structurally sound—it’s the soil that needs help.
HMI’s Solution: Deep Foamjection® + Soil Link Grouts
HMI offers a non-invasive, engineered approach to stabilizing seawalls using our Deep Foamjection® and Soil Link chemical grout systems:
Deep Foamjection®: We inject high-density polyurethane foam deep into the weakened soil. As it expands, it compacts loose soils, fills hidden voids, and lifts where needed—all without excavation.
- Soil Link chemical grouts: These specialized grouts form a water-blocking matrix in the ground, cutting off flow paths and restoring the integrity of the soil mass. They also fill cracks and voids without exerting expansive pressure on sensitive seawalls.
These methods reinforce the soil structure behind the wall, eliminate water migration, and extend the life of the seawall itself.
HMI Real Life Results
We’ve helped waterfront municipalities, marinas, and property owners avoid costly replacements by stabilizing their existing seawalls in days, not weeks. The work is quiet, fast, and doesn’t interrupt waterfront operations or usage.
